| Patents for John F. Krenkel |
Patents 1 -
9
of 9
      |
| Number | Date | Patentee | Title | Type |
| 752,313 | Feb. 16, 1904 | J.R. Thomas, H.S. Spencer | Feeding device for woodworking-machines | wood planers |
| 756,725 | Apr. 05, 1904 | H.S. Spencer | Hollow-chisel mortising-machine | mortising machines |
| 767,504 | Aug. 16, 1904 | H.S. Spencer | Mortising-machine | mortising machines |
| 771,064 | Sep. 27, 1904 | L.J. Hanhart | Band-saw mill | band sawmills |
| 801,519 | Oct. 10, 1905 | T.C. Frost | Journal-bearing | woodworking machine mechanisms |
| 803,702 | Nov. 07, 1905 | T.C. Frost, J.J. Meyers | Band sawing-machine | bandsaws |
| 821,137 | May 22, 1906 | J.R. Thomas | Planing machinery | wood planers |
| 831,577 | Sep. 25, 1906 | J.R. Thomas | Feeding device for woodworking machinery | wood planers |
| 871,119 | Nov. 19, 1907 | L.J. Hanhart | Band sawing-machine | bandsaws |
